| residues of organochlorines in mallards and blue-winged teal collected in colombia and wisconsin, 1984-1989. | we compared the seasonal concentrations of 12 organochlorine (oc) compounds in samples of breast muscle, associated skin, and subcutaneous fat of blue-winged teal (anas discors) collected in ciénaga grande de santa marta, colombia (1987-1988), and of mallards (anas platyrhynchos) and blue-winged teal collected in wisconsin (1984-1989). although these species have similar feeding habits and overlapping breeding distributions, their winter ranges differ markedly. most blue-winged teal winter in th ... | 1996 | 8781073 |